Sand-grading apparatus for glass-grinding machinery.



. WLU.

SAND GRADINQAPPAHATUS ma GLASS smmrm Mmmm PPUCATION YLE OCT. la, HHS. REQEWE ,Mmm 25, |935- y n 1,223,461. Patend Apn'fegl?.

WITNESSES Y( INVEN'T'CHV FIGA l. WILLIS.

SAND GRADING APPARATUS FOR GLASS GRINDING MACHINERY.

APrLecATlou 111.20` 01:1. 1B. 1915. HENEwED 11u11 2s. '1916.

A1,22:?,461 V1311111111111 Apr. 24,1917.

3 SHEETS-SHEEY 2.

B WITNESSES y l INVENTQR J. WILLIS.

SAND GRADING'APPARATUS FOR GLASS GRIND NG MACHINERY.

APPLlcmoN man ocr. is. 191,5. nENEwED fue. 28. 1916.

v1,223,461.l Patented Apr. 24,1917.

3 skins-super a.

nas .2,5

is f

UNITED .STATESPATENT OFFICE.

i TENNEWDYANM,

Appllultlon Med Qctober 11E, 1915, Scrlal'No. 56,343,A Ilcnc'wd iigusi 28, 1816. Serial Noi 117,383,

.Ning

needed. l

Snndvby its nature. tends toettvleinto minpunt inzisse.t by jgrnvimt-iii:thioiigh n quiescent inuss ji' body 'of water.' nto rumfiin in s'usprsion iii the pi'cs'inc'n of :in 75 opposing ninfa d cnijriitnf It. nifiji bcffcari'icd along in :i horizontal Sirezin, ffi'ni which it w-iil pr cipitnte h v ginvitlvfdcpend- 'ing 0n the mi@ .if How ofth'c cini'nL. dcpth stream passes over the several collecting chambers. i

Referring to the accom anying drawings, showing preferred em iments of the 1n venton, 2 represents the usual glassgrindmg table rotatably mounted upon any suit-V able support, having the' usual surrounding collecting gutter 3 for the centrifugally discharged sands and water, leading bac kwardly to a screen 4 which is interposed in thel course of flow to the preliminary receiving pit or chamber 5.

Superimposcd above the rotatable table '2 are the usual grinding runners 6, 6, of wellknown construction, underneath which the glass'plates are rotated by the table in connection with the supply of abrasive and water, and the customary shoes of the runner.

A distributing trough 7 of any suitable construction is usually located above the table at or about its middle portion, whereby to distribute the Sands and water to the table, and between the runneis, as it is delivered to the trough by either one of the conveying pipes hereinafter described.

Y The preliminary receiving chamber 5 is located, as shown in IFig. 1, adjacent to the table. and to the circulation channel therefrom, to receive all of the water and sand as it is washed olf from the table, and to also receive additional quantities of fresh coarse sand from time to time. For such latter purpose, a coarse sand ,box or bin 8 is located atany convenient position and eleva tion, whereby coarse sand 'may be delivered by conduit 9, in connect-ion with a stream of water from a hose, conduit 9 leading to the screen 4, where-by to deliver fresh sand into thc circulation and the. primary pit 5 of preliminary grader A. Such sand, with the water from the table, together with the alreadv used sands washed therefrom, are thus all discharged into the preliminary chamber 5, in which the coarsest and heaviest sand 'will fall to the'bottom.

The lighter and liner sands, comprising the various grades to be classied .by the later treatment, pass horizontally over an intervening partition 10, into an adjacent chamber 11, from which leads a. suitable overflow, 12 at any convenient point, so as to avoid flushing of the chambers 5 and 11.

. The said chambers, -as thus constructed, form a primary graden by .which the sands are initially separated into two grades to wit, coarse sand; and all finer sands which are sufficiently light and small to be carried over the top of partition 10, by the horizon tally moving stream.

The coarsesands thus collected in 'chamber 5, are removed therefromby any suitable means, 'ns an air lift pump 13;, haring a supply pipe 14 leadingV to the distributing trough 7 It the middle portion of the table.

The air lift pump, if used, is provided with the usual air supply line 15 for the purpose of actuating the-pump.

All of the finer' grades of sand collected in compartment 11, which are intended for use when reclassified into their several sub grades, are m a similar manner carried by pipe 1G and air lift pump, 17 over to the seconder grader B.

If desired, Vthe inlet end of air lift pump 17 may be extended lin the form of a goose neck 1 8 upwardly to any desired level above. the' bottom of chamber 1l, of primary grader A, whereby to take the collected sands from above the bottom, and also utilizing the gravitating tendency of the water contents of chamber 11 in facilithting the action o f the air lift pump.

The secondary grader B, like primary gradcrA, is also located in convenient relation to the rotatable table 2 for distribution of the sands thereto, and comprises a series of sluice boxes or collecting chambers b, b', b2, b", preferably arranged in alinemcnt, one beyond the other, separated by intervening partitions 19, 20, and 2l respectively, of substantially the same height, thereby providing for a horizontal ow or current of water thereover, from one end to the other of the. entire secondary grader and its series of collecting chambers.

Pipe .16 discharges the sands and water into the first compartment b, a surrounding housing box or cover 22 being preferably employed to prevent splashing, :Bid insuring the depositing of all of t e vater and sands into the chamber b.

At its other end an overm lissage 23 leads from the last collecting cliamber b by a suitable trough back to the space surrounding the table, and eventually, by gutter 3, to the circulation. A similar overflow connection for the rst chamber b may be provided, as indicated' at 24, such overflows haring adjustable gates or shut-olf devices,

. as desired.

F or the purpose of facilitating precipitation -of the finer sands through the substantially quiescent contents of the several chambers b, b', b, b', itis desirable that the longitudinal travel theretluough,l of the main horizontally traveling stream, shall be as long as possible, and that the of the current shall b e 'gradually retar ed or-.lesscned.

For such purpose I have gradually widcned thechannel by di'verging one of the said walls 25, of compartments b', b2,- b, thereby correspondin lv reducing the rate of ow therethrough, wiile the initial chamber. b is ofpthe narrowest width, but somewhat lon r. The-increased. travel through theinitialv chamber b facilitates the depositing of the sands of-the desired '-tinenem,y bemg the of theessembled finesands,into lso the first cofnpnrtin'eutb, ill of .the-'remaining snds passing for tioir. 19'. Gon 1x1-ned 'trsirfel` of the 'curr'entover the successi.re,:coinpaitlnenrs 'bib/1,625 b l und the''=intcrirehingv bnr'riers'y19 20 and' 2L,- y throiiglr 'u l-i horizontally- Widen'ngjchannel, i;rglvelin'gt' sil'ccessivel'iwi nd relatirehir 4slower 5 rates' of speedin its passagefthioughoutathe entire series of chambers, ip ,rinits -the 'grav-` of-tl1e s17lcce ssi 'rely linerV and ,lighter i. sands'throughthezqtiiescent- 'lower bodies of ratei-' lfe'i'i'ects their collectionlir'i the bob. Aruins 'o 'die' several chambers. I

"These bottoms` :1s-shown n"-I" ig;: preferblrsloped downwardly toyvsirdtheir 'middle portion, :nid eacl-rchainher'is' conf', n ected'witl'i the"oi 1t l e"tpipe"26', 27, '28 Vand 29,

`respeciyely,'eachof which pipes in turn' is connected \\'itli,'a1nziniold 30 *lending-to, 20 pt iinpy Bl driven 'by 4i'notor 32, A (lehrer-y. i pipe BBleads from pump Blover'to the middleport-ion' of'the't'tblgwhere thesad find Wte'r Adrawn 'fioni.emi-particular coinphrt-f' ment of the secondary' grader i's positively', discharge-d' into the. troiigh 7,' and therefrom tothe tnblefv 1- 4 As will bev obse 1Med. fthe collecting.por-

tions ofthe" variouschambers 'of thesecf ondnriY gradeianre,located belowA tlie'lei'elof 'the-- tableQi-the upper 'portion Aof they grader being above thlerelfofsaid'.tflble: I? therefore folloiis'thn't the contentsoi the'chzinn bers must-'beposi-tively. removed from 'thel severril2collecting chambers und carried upnfardly; 4siifici'ently high-'..to be discharged upon the tablegrhich function is performed i lbythe-motor.zicsnuted pinnp 31. Encl1=ot`=`tl1e connect-ingy pipes; 26, Q7, and-.29, respectively, leading to inginifold 30' '.isipl'fovided'niith a controlling il e 34,`l1zif` in g n. otu'atinglei-'er 435 Whi'chin-ayy extend -i outwardly Y,Underneath the grader for easy manipule-tion by nh'grorlrrnnn. sons to en#` lfrbleihim ioopen `flie 'valve of .the particular;

connecion, desired. gaccording to the grade oi sand to begsupplied 4to ,the tnblel l For-'thepurpose oi'iishiriggngni 'BOorvits brauch; oonneeti'ns Q6. 27 ,128

f any-rime, proiide agwater supply Vs vs'f'einI ,consisting 'of aimfiin supply' pipe?. B6 und Y mzinfold BT i h avingi'ali'e' iitrolle'd branch connectionsfS" leiidi'rifglto the Ise r ,=r1'l 1')i'pcs .mention'ecli iijherehy eitherk of suchbranch f connections' may be opened to 4s iipp '-'ingV -flow'o writer to .clearfout'f-tl f desired., i l 'I -Olfdimufil n'gj'deposite githejcenrerli o 1o ment. vand will be -puinp uppliedto the ,tableA as neef "v zijcer' unds'iirp i rciilhti'o ed the d the ii 1th 'fresh "11n Le iefiiie 'isV 4 The advantages of the invention are that it provides a system of sand grading utiliz- .the main interior.

'By this means I insure an absolutel calin flow of the' water from the tot e sec'- ond compartment, the sand and water be in thus thrust toward the straight inner si e of the tank and falling quietly into the interor. The construction also avoids tlieicreation of any reverse or upward flow currents, thereby facilitating the quiescence of the contents of the tank. A

ing natural forces, by properly designing the primary and secon ary graders, an

vusing the positively acting transporting mechanism. and the several other parts as above described.

TIE invention is comparatively sim le in construction and economical to buil and 'maintain' in order. It performs its functions to the desired degree, facilitating and cheapening the grinding operations, and is at all times under the control' of the oper-' 'ator, while utilizing all of the coarse sand to destruction,a nd providing for renewal -of fresh sandas needed during the grindaving thus I claim is:

ingoperation. l

described my invention what -1. Apparatusv for classifying abrasive material for a glass grinding machine comprisin in combinationwith a glass grindmg ta le, means for collecting the abrasive and Water, a partitioned primary tank .adapted to,receive the abrasive and water from the -table and having a plurality of communicating closed bottom chain rs, means fordelivering coarse abrasive and water from one of said chambers to the table, a secondary grading tank having a series of settling chambers and intervenin partitions, means for removing sand an water from the other chamber of the primary grader to the first settling chamber of the secondary grader, a manifold pipe having connections leading from each settling compartment of the secondary grader, s. pump connected with said manifold pipe, and a delivery pipe leading from said pump to the table. I

2. In combination with a glass grinding table, a primary. gradenadaptedto receive the: overflow therefrom.' means for vsupplying fresh abrasive and water to said priinal'y grader; meansA for' removing coarse ments adaptedto provide for a flow. thereover of the water and abrasive in suspension, means for removing finer abrasive and water from the primarygrader to the first of said chambers, a pum a conduit connected with said um an of each of the cham rs of the secondary grader, 'and a delivery pipe leading 'from the pump to the table.

3. In combination with a glass grinding table, a secondary grader having a series of with' the bottom settling compartments and intervening par-- titions, thecross area of said compartments increasing from one ,to the other in the direction of the'flow, means for removing abrasive and water from the lower portion of each compartment and deliverin it to the table, and means forsup lying a rasive and water to the first of said, compartments and for preventing splashing therein.

4. In combinationwith' a glass grinding table, a sand grading tank having 4a series of collectin compartments extending below the leve of'the table, positively acting means for, downwardly withdrawing the contents of each compartment singly'and for lifting said contents and delivering the saine above thev table, means for delivering abrasive and water to the first of said compartments, and overflow means for carrying off surplus water and material.

5. In combination with a'glass grindin table,A a settling tank having a series o communicatingchambersseparated b y transverse partitions below the normal level of the water, said compartments having gradually diver-ging side walls whereby to increase the cross area of the .several coinpartments successively and effect a gradual diminution in the progress of the current,

vmeans for delivering abrasive and water to iis' plurality of grades, a secondary grader having a plurality of settling compartments, a splash wall barrier'located at the inlet position ofl the first of said'compartments and 'a conduit and actuating means therefor adapted to convey abrasive and wat-er from' one of the preliminary collecting chambers and to deliver the same behind said barrier into the first compartment of the secondary grader.

7. In combination with a glass grinding table. a secondary grading tank provided with a luraltv of erom partitions and oorresponding collecting chambers adapted to receive abrasive from an upperhorizontally flowing current in grades of successively decreasing size and neness, 4 Said chambers extendingbelow the level of the grinding table, means for supplyin abrasive and. -water to the-I first o sadicompartments above the level-of the.

grinding table, a .manifold 'pipe having valve controlled. connections leading to the bottomof each of said compartments,ac tuating handles for the valves of each of said connections, a pump connected -witli said/manifold pipe,.and 'a delivery' pipe leading from said pump to the table.

8.'In'4 combination with a glass grinding table, a preliminary. plural-chamber collecting 'tank ada ted to receive abrasive and 'f vater -from 't 1e table andto separate the "contained abrasive' into a` plurality .of

aon

grades, a-,secondarygrading tank provided with'a-- lu 'f respon y lecting. chambers,- means'for removingfabrasve and water from one of the ,chambers `of the preliminary tank and delivering it into4 the rst chamber of the A secondary grading tank`,\amanifold pipe having valve controlled connections lead-v ing, downwardly from the bottom of each compartment fof/*the secondary tank, a pump connected with said manifol p'ipe, and a delivery pipe4 leading 'pump to the table. c

9.' In combination with a glass grinding table, a preliminary plural-chamber collecting. j tank adapted to receive abrasive and Water from the table and 'to separate the contained abrasive into a plurality of t y of cross partitions and cor-- water from th( first of said chambers to the grades, means for removing abrasive table, a secondary grading tankpro'vided' with a luralii y of cross partitions and correspon ing colecting chambers, means for removing abra sive and water from they sec- 'i 0nd chamber of the preliminary grading tank and deliv sring it into the vfirst chamber of the seconda ry grading tank, a manifold pipe havingvalve controlled connections leading. 'downwardly from the bottom ofeach compartment of the secondary grading tank, a pump :onnec'ted with said manifold pipe, and'a e livery pipe leading from said pump to the table. a

10. In combination withgrinding mechanism usingvallrasive material, an abrasive grading tank having ar series of communieating compartments provided *with lower collecting 01 tions,V means for collecting abrasive an vater from the grinding mechanism and deiverin it to tie first of said o surplus water and material from the last-of said c3mpartmcnts, a.nd means for positively removing abrasive and water from the` lower collecting portions'of each" compartment singly and for positively delivering the same to the grinding mechanism.

In testimon v whereof I hereuntoailix my signature in'ilie presence of two witnesses.

JOHN WILLIS.

Witnesses: v

C. P. IGLEW,

compartments over ow meanslfor carrying 

